Journal
PLANT AND SOIL
Volume 395, Issue 1-2, Pages 31-44Publisher
SPRINGER
DOI: 10.1007/s11104-015-2445-1
Keywords
Control agents; Grey mould; Induced resistance; Jasmonic acid; Plant disease; Tomato; Biochar
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Funding
- Autonomous Province of Trento
- Israel Ministry of Agriculture and Rural Development [132-0693-1-61]
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The goal of this study was to identify the induced resistance pathway mediated by biochar in the tomato - Botrytis cinerea pathosystem. Tomato wild types and mutants modified in their salicylic acid (SA), ethylene (ET) or jasmonic acid (JA) metabolism were grown in a potting medium amended with biochar produced at 450 A(0)C from greenhouse wastes, to identify the possible pathway(s) involved in biochar-mediated resistance to B. cinerea. Early cellular response of H2O2 accumulation was biochemically tested, and the transcriptional changes of 12 defense-related genes upon B. cinerea challenge of detached leaflets were analyzed. Biochar amendment resulted in about 50 % reduction in B. cinerea disease severity in all tested genotypes with the exception of a JA deficient mutant, def1. Biochar amendment induced priming of early as well as late-acting defense responses particularly in the genes Pti5 (ET-related) and Pi2 (JA-related), which are known to be crucial in resistance against B. cinerea. Stronger and earlier H2O2 accumulation subsequent to B. cinerea inoculation in all genotypes was observed as a result of biochar amendment, with the exception of the def1 mutation. Biochar-mediated IR in the B. cinerea-tomato pathosystem involves the JA pathway.
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